A data management system and method that collectively manages material data by synchronizing the material data stored in a material server with an OA server. The method includes sequentially storing material data including generated video/audio signals in at least a material server; determining that the material data stored in the material server has either a synchronous attribute or an asynchronous attribute with respect to at least an OA server which stores material data to be transmitted to a broadcast network. The method also includes synchronizing, between the material and OA servers, processing operations with respect to the same material data existing in both the material and OA servers and respectively having a synchronous attribute.